/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.io.gcp.bigquery;



import com.fasterxml.jackson.databind.ObjectMapper;

import com.fasterxml.jackson.databind.SerializationFeature;

import com.google.api.services.bigquery.model.TableRow;

import com.bff.gaia.unified.sdk.coders.AtomicCoder;

import com.bff.gaia.unified.sdk.coders.Coder;

import com.bff.gaia.unified.sdk.coders.StringUtf8Coder;

import com.bff.gaia.unified.sdk.values.TypeDescriptor;



import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;



/** A {@link Coder} that encodes BigQuery {@link TableRow} objects in their native JSON format. */

public class TableRowJsonCoder extends AtomicCoder<TableRow> {



  public static TableRowJsonCoder of() {

    return INSTANCE;

  }



  @Override

  public void encode(TableRow value, OutputStream outStream) throws IOException {

    encode(value, outStream, Context.NESTED);

  }



  @Override

  public void encode(TableRow value, OutputStream outStream, Context context) throws IOException {

    String strValue = MAPPER.writeValueAsString(value);

    StringUtf8Coder.of().encode(strValue, outStream, context);

  }



  @Override

  public TableRow decode(InputStream inStream) throws IOException {

    return decode(inStream, Context.NESTED);

  }



  @Override

  public TableRow decode(InputStream inStream, Context context) throws IOException {

    String strValue = StringUtf8Coder.of().decode(inStream, context);

    return MAPPER.readValue(strValue, TableRow.class);

  }



  @Override

  protected long getEncodedElementByteSize(TableRow value) throws Exception {

    String strValue = MAPPER.writeValueAsString(value);

    return StringUtf8Coder.of().getEncodedElementByteSize(strValue);

  }



  /////////////////////////////////////////////////////////////////////////////



  // FAIL_ON_EMPTY_BEANS is disabled in order to handle null values in

  // TableRow.

  private static final ObjectMapper MAPPER =

      new ObjectMapper().disable(SerializationFeature.FAIL_ON_EMPTY_BEANS);



  private static final TableRowJsonCoder INSTANCE = new TableRowJsonCoder();

  private static final TypeDescriptor<TableRow> TYPE_DESCRIPTOR = new TypeDescriptor<TableRow>() {};



  private TableRowJsonCoder() {}



  /**

   * {@inheritDoc}

   *

   * @throws NonDeterministicException always. A {@link TableRow} can hold arbitrary {@link Object}

   *     instances, which makes the encoding non-deterministic.

   */

  @Override

  public void verifyDeterministic() throws NonDeterministicException {

    throw new NonDeterministicException(

        this, "TableCell can hold arbitrary instances, which may be non-deterministic.");

  }



  @Override

  public TypeDescriptor<TableRow> getEncodedTypeDescriptor() {

    return TYPE_DESCRIPTOR;

  }

}